Question

I received his mother’s telephone call at eleven.＿＿that he was badly hurt in an accident yesterday.

A．Then did I know

B．Only then I knew

C．Only then did I know

D．Only then knew I

Answer 1

C

only修飾句子的狀語（副詞、介詞短語、狀語從句）位于句首時，句子的主謂部分倒裝。